Okay, thanks for the floor, so to speak.

First of all, I'll be fair and lay out my worldview. I live in a middle-upper class American home in the suburbs. I was raised in the church, and only recently started to question the existence of God. Therefore, my view will likely have a subconscious bias towards wanting to believe God exists. In fact, that is probably the likely factor as to why I believe what I do today.
Another thing: unlike what seems to me the majority of Christians today, I accept as nearly irrefutable Evolution Theory and the Big Bang. Being a Creationist in my view is like believing in a flat earth.
I will make my argument hopefully simple, and I will choose only 2 subtopics.
1) The origin of the universe
On this matter, I hardly know close to enough about modern physics to understand a naturalistic explanation of how the dimension of time and space came to be. However, with my limited understanding, trying to comprehend anything "before" the big bang is hypothetical. I doubt with space-time tools we'll ever be able to measure any fields in other dimensions, if they exist. In this matter, for me it comes down to believing that the universe came to be as the result of random fluctuation in another dimension we don't know about. I accept this as possible, and not disprovable. On this matter, in my eyes, I think believing there could be a God who envisioned the time-space dimension equally plausible.
The only thing that tips the balance for me is the incredible fine-tuning of the universe. Matter could more than easily exploded, then a wrong physical constant could have ended the universe as we would have known it. This is pushing an argument of design, however, where an argument of infinite universes or a "just-so" argument can give an atheist grounds for his belief. Again though, we have no proof that I know of that there was an infinite number of universes made.
2) The argument from life
This argument stands that life as we know it today is far too complex to have originated by naturalistic means. However, it also has the flaw of the God of the gaps dichotomy. Also, evolution proves that life did evolve from lower, less complex life forms. Again however though, many systems exist that a naturalistic explanation on a biochemical scale seem quite far-fetched. What I believe is this:
The first original life form would have needed complex, minute structures in order to survive. Living material
could have evolved from non-living material, but there is as far as I know no way to prove it. This has never been observed, but as I said before, this proves nothing. What tips the scales for me is this estimate by MIT computational quantum physicist Seth Loyd. According to Loyd, in the known physical universe, chance alone is capable of producing 400 bits of prespecified information. This amounts to a sequence of 82 letters and spaces. A single cell has information in it enough to fill 100 volumes of encyclopedias, according to a book I read called "I don't have enough Faith to be an Atheist." Anyway, according to the estimate by Loyd, only the words "To be, or not to be, that is the question. Whether 'tis nobler in the mind to suffer..." can be produced in the known universe by chance alone. Of course, this does not take natural selection into account, however, I wonder at how much closer to 100 volumes of encyclopedias it would take us.
From the original life form, species clearly evolved. However, since I believe that the original life form came from the works of an intelligent designer, I believe what the Genesis account seems to portray. The account describes "God" making more and more complex organisms. Finally, he chooses to "create" man "in His own image." I think from this standpoint, God has been behind evolution and guiding the process of the progression of life. He finally created us, distinctly different from the rest of the animals, or "in His own image." I take "image" to mean characteristics that God himself has. That is, logic, reason, appreciation of life, etc.
- Anyway, that is why I believe what I believe. Those are arguments from two points, and I have other, less developed arguments too. In each argument, I notice that there is always an alternative to believing "God" did it. I interpret this through my worldview as God allowing us free choice and will in all the decisions we make. (I also consider free will as an attribute of God that He imparted to us when He made us "in His image.")
You are free to believe what you want to believe, and I am sure all my arguments I make here have a rebuttal, but it is my stance on things up to this point. Thanks for reading all of this, if you did. I am equally open to reading and pondering the views of any other individual on this board.
In the end, the argument of "God" comes down to one thing. Did He do a MT or not when He supposedly created everything? It could make all the difference.